英语语法分析

Objective To analyze the factors that affect the ultrasonic diagnoses of pseudo-positive choledocholith.

目的分析超声诊断胆总管结石假阳性的原因及影响因素。

Methods 1306 cases of gallstones were retrospectively analyzed, and 506 of them were found to be choledocholith(38.7%).

方法回顾性分析住院治疗的胆石症患者1306例，其中经超声诊断为胆总管结石506例，占38.7%。